1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b82c6405d696e6045d862a6a845f175be57f71e4e6a4747538c737f93f8afd1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fadd9bb-20cd-46cc-8162-e5441a473f05.json and https://artists.proofprofile.net/proofs/artist/1fadd9bb-20cd-46cc-8162-e5441a473f05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e5d095bf4292f052a0070ac08387b197987334251c3a956047ee6f9bb70e21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2380849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5b0888862e2ad27fd92085b2309f5c29e90aa6223fc1376003807e4a7e8d55. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCIOS2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459792bd07c9725e31cc532e70c3a4d9b948778edead6b51a725b3e020100d61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC59V2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f091d4e79ae4ccab241e2fb715322bf5ce3fc083ed84aec6f676271f7cac94e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e05c322663f1b209478841f564d279be12426b45e512955a40269d8b0e9b4a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJV2498766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce80e04784b0a63994f72aa3824c3f8ef77f7b194c2863aa7ade2d6218f23c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141ac60773d4d5fcc9e549934e59f9f83067dc78b08768c9eb67df9418408c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c3a46fa2433658c47f4941933a42cb5f2e6c3a6e2f7f189459ecfe7a8a0b29. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2f07d7f22ebc2bd7ceb250243524df2c57aaf92cf745b49ad690e22b0bf1a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893c007e432cc3b64fe10617fe5f43b8c2364d59e94415e285e4565527ccafe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f2c3f2a906daf3216055ac68e76883744e5a7ea7fe32747c0ab547a818bb0b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a185805d9f686f243da7d524940804769d40f01f6c0723be3ed4fdbab772e45. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4145518b4c152ffa57e357592b96b1ac411d2ea38e76c812177eb6462cad28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21fcd0136e62824cb23a6c516fcbf070875c9bef2a3878f186ac400d1149895. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c1a7848e484861b7ff3128db514ffe77365511a09b823022ec8711f1258a7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b3c4c5d5e89dc3e0ec65256f598be10e99d00aff6bf65d1d41548ca9967d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01ef45518b94afc65092ae184b939c62ee01ef46d0ffc879fbfcd4eba19d4d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabedf73afe1472c6d17bc9f720b8b1461c3d1afda8293e548c1a22d7de7c9b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8add585533947337116a8254b4a383f12bed8181181478d6e5c61a02e82d025d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf400a25075a9a921ff69a6bdfff3a03793087c9f95f70403580c44ebe72610. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd004d3edd70fef88d7d96f4966884469d6a4446af6c576422d6216573fb49cea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9M2326082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7118ccb62cfa5561aaa11e39140fa65f348dfd3ab451d47805ef6893901981. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCKIE2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf48d54d0529d7e5867383f8287cf1bd647d839cce8907da5cf5fef9a43ff62f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCKIE2400008.